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Crop Response to Carryover of Mesotrione Residues in the Field

Published online by Cambridge University Press:  20 January 2017

Rachel N. Riddle ,
John O'Sullivan ,
Clarence J. Swanton  and
Rene C. Van Acker
Rachel N. Riddle*
Affiliation:
Department of Plant Agriculture, University of Guelph, 1283 Blueline Road, Simcoe, ON N3Y 4N5, Canada
John O'Sullivan
Affiliation:
Department of Plant Agriculture, University of Guelph, 1283 Blueline Road, Simcoe, ON N3Y 4N5, Canada
Clarence J. Swanton
Affiliation:
Department of Plant Agriculture, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada
Rene C. Van Acker
Affiliation:
Department of Plant Agriculture, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada
*
Corresponding author's E-mail: rriddle@uoguelph.ca
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Abstract

Two field residue studies were conducted from 2005 to 2007 in Simcoe, Ontario, Canada, to evaluate the effects of mesotrione soil residues on injury, plant dry weight, and yield of sugar beet, cucumber, pea, green bean, and soybean and to verify the potential of reducing a 2-yr field-residue study (conventional residue carryover) to a 1-yr field study (simulated residue-carryover study) by growing these crops in soil treated with reduced rates of mesotrione applied in the same year. There was a significant difference in mesotrione carryover between 2006 and 2007 and differences between years can be explained by differences in soil pH and soil moisture. The conventional and the simulated residue-carryover studies successfully measured mesotrione persistence and rotational crop sensitivity. Both studies showed that sugar beet was the most-sensitive crop with injury, plant dry weight reduction, and yield loss because of mesotrione residues as high as 100%. Green bean was the next most-sensitive crop to mesotrione residues followed by pea, cucumber, and soybean. The simulated residue-carryover study provided a more-rigorous test of rotational crop sensitivity to mesotrione residues than the conventional residue-carryover study, especially at higher rates for the more-sensitive crops. For the other crops, responses to mesotrione residues were similar between the conventional and simulated residue-carryover studies.

Se realizaron dos estudios de residualidad en campo desde 2005 a 2007 en Simcoe, Ontario, Canadá, para evaluar los efectos de los residuos de mesotrione en el suelo sobre el daño, el peso seco de planta y el rendimiento de la remolacha azucarera, el pepino, el guisante, la vainica y la soya, y para verificar el potencial de reducir un estudio de residualidad de 2 años bajo condiciones de campo (residualidad convencional) a un estudio de campo de 1 año (estudio de residualidad simulada) al crecer estos cultivos en suelo tratado con dosis reducidas de mesotrione aplicado en el mismo año. Hubo una diferencia significativa en la residualidad de mesotrione entre 2006 y 2007 y las diferencias entre años pueden ser explicadas por diferencias en el pH y la humedad del suelo. Los estudios de residualidad convencional y simulada midieron exitosamente la persistencia de mesotrione y la sensibilidad de los cultivos de rotación. Ambos estudios mostraron que la remolacha azucarera fue el cultivo más sensible a los residuos de mesotrione con daño, reducción de peso seco de planta y pérdida de rendimiento de hasta 100%. La vainica fue el siguiente cultivo más sensible a los residuos de mesotrione, seguida por el guisante, el pepino y la soya. El estudio de residualidad simulada brindó una prueba más rigurosa de la sensibilidad a los residuos de mesotrione de los cultivos de rotación que el estudio de residualidad convencional, especialmente a las dosis más altas para los cultivos más sensibles. Para el resto de cultivos, las respuestas a los residuos de mesotrione fueron similares entre los estudios de residualidad convencional y simulada.

Keywords

Mesotrionecucumber, Cucumis sativus L.green bean, Phaseolus vulgaris L.pea, Pisum sativum L.soybean, Glycine max (L.) Merrsugar beet, Beta vulgaris L.Conventional residue-carryoverrotational cropssimulated residue-carryover
Type
Weed Management—Other Crops/Areas
Information
Weed Technology , Volume 27 , Issue 1 , March 2013 , pp. 92 - 100
Copyright
Copyright © Weed Science Society of America 

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